Use better_errors in production env

patch.rb

# Gemfile
gem 'better_errors'
gem 'binding_of_caller'

# config/application.rb
module BetterErrors
  class Railtie < Rails::Railtie
    def use_better_errors?
      return true if ENV['BETTER_ERRORS']
      !Rails.env.production? and app.config.consider_all_requests_local
    end
  end
end

# config/environments/production.rb
Rails.application.configure do
  config.consider_all_requests_local       = !!ENV['BETTER_ERRORS']
  config.action_controller.perform_caching = !!!ENV['BETTER_ERRORS']
end

# config/initializers/better_errors.rb
BetterErrors::Middleware.allow_ip! '192.168.0.0/24'